title: Synthesis, X-ray crystal structures and optical properties of novel substituted pyrazoly 1,3,4-oxadiazole derivatives.
abstract: Novel pyrazoly 1,3,4-oxadiazole derivatives were synthesized and characterized by (1)H NMR, IR, HRMS and X-ray diffraction analysis. UV-vis absorption and fluorescence properties of these compounds in different solutions showed that the maximum absorption wavelength was not significantly changed in different solvents; however, maximal emission wavelength was red-shifted with the increase of solvent polarity. Absorption λ(max) and emission λ(max) was less correlated with substituent groups on aryl rings.
authors.affiliation: Institute of Organic Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Hong-Shui
authors.initials: HS
authors.lastname: Lv
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Xie
authors.forename: Wei-Yong
authors.initials: WY
authors.lastname: Liu
authors.forename: Zhong-Liang
authors.initials: ZL
authors.lastname: Gong
authors.forename: Bao-Xiang
authors.initials: BX
authors.lastname: Zhao
mesh_terms: D018360:Crystallography, X-Ray; D005453:Fluorescence; D008958:Models, Molecular; D015394:Molecular Structure; D055620:Optical Phenomena; D010069:Oxadiazoles / Q000138:chemical synthesis / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism
chemical_list: D010069:Oxadiazoles; D011720:Pyrazoles; C031280:pyrazole